Ricerc@Sapienza

This paper establishes the conditions under which indeterminacy can occur in a Neoclassical growth model with international labor mobility. In the model, workers are supposed to move freely across countries without restrictions, and according to a Harris–Todaro mechanism that makes migration flows sensitive to differences among labor markets conditions. The paper shows that indeterminacy requires the marginal returns to immigrant labor to be diminishing, and no need for productivity externalities at a social level.

Research on weight systems used during the Bronze Age, prior to the introduction of writing,
generally assumes that the widespread use of metal as ‘commodity currency’ eventually resulted
in the adoption of widely shared systems of measurement. Many studies aimed at the identification
of recurrent weight values as multiples and/or submultiples of theoretical standard units. This
approach faces two limitations: 1) the absence of written sources, or at least statistically sound